Maths practice for 12-year-olds - page 8 of 351

Number of problems found: 7001

Sum of the fractions
Find the sum, express your answer to lowest terms. 1. 1/4 + 2/4= 2. 1/6 + 3/6= 3. 6/10 + 2/10= 4. ¾ + ⅛= 5. 5 3/5 + 2 ½=
Cows and hens
In a group of cows and hens, the number of legs is 14, more than twice the number of heads. Find the number of cows.
Melting 3 cubes
The sides of the three metal cubes are 30 cm, 40 cm, and 50 cm, respectively. Find the side of the new cube formed by melting these cubes together.
When three
When three positive integers a, b, and c are multiplied together, their product is 64. Suppose a < b < c. In how many ways can the numbers be chosen?
Exactly divisibled
Find the least number that can be divided exactly by all the even numbers between 10 and 20
Solve 27
Solve fraction problem: 9/27 + 3/54
Greatest number
What is the greatest number that will divide 62, 78, and 139, leaving remainders 2, 3, and 4, respectively?
Two trains 10
Two trains of lengths 75 m and 95 m are moving in the same direction at 9 m/s and 8 m/s, respectively. Find the time taken by the faster train to cross the slower train.
A car 10
A car covers a distance of 200 km in 2 h 40 min whereas a jeep covers the same distance in 2 h. What is the ratio of their speeds?
A baby
A baby weighs 8 and 1/4 pounds at birth. Two weeks later, she weighs 8 and 7/8 pounds. How much did the baby gain?
At 5:16
At 5:16, what is the acute angle between a minute hand and an hour hand?
An eraser
The cost of an eraser is $ 0.80 and the cost of a pencil is $ 2. What is the ratio of their costs in simplest form?
Five and four
Five divided by four times the number is 0.25. What is that number?
Lily spent
Lily had $812. She spent 1/7 of the money on a cupboard and 1/6 of the remaining amount on a dressing table. How much did Lily spend on the dressing table?
Puppy
A family adopts a puppy that weighs seven and 7/8 pounds. Two weeks later, they take him to the vet, and he weighs 12 and 3/16 pounds. How much weight did the puppy gain?
Water tank 12
A rectangular water tank is 5 m high, 3 m long, and 2 m wide. How many liters of water can it hold?
Find value
Find value of x: x/5+x/2=-1/5-3x/2
The speed 3
The speed of a boat in still water is 10 km/h. If the boat goes 37.5 km upstream in 5 h, find the speed of the stream.
Collecting clothes
Larry and Myra are collecting clothes for a clothing drive. Myra collected 2 1/2 times as many clothes as Larry did. If Larry collected 4 4/5 bags of clothes, how many bags of clothes did Myra collect?
The product 15
The product of two consecutive even numbers is 48. If the square of the smaller number is 35, what is the other number?

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